scoped_glib: Fix ODR violation

Moving the template specialization into the header causes ODR
violation when the header file is included in other units. Making
the specialization inline to avoid this problem.

Bug: chromium:1291247
Change-Id: I090548c1c3dd07a8c46b87ae90ebdd45a60a5cde
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/251200
Reviewed-by: Mark Foltz <mfoltz@chromium.org>
Commit-Queue: Mark Foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#35969}
diff --git a/modules/desktop_capture/BUILD.gn b/modules/desktop_capture/BUILD.gn
index 363e318..8701c29 100644
--- a/modules/desktop_capture/BUILD.gn
+++ b/modules/desktop_capture/BUILD.gn
@@ -565,6 +565,7 @@
       "linux/wayland/base_capturer_pipewire.h",
       "linux/wayland/egl_dmabuf.cc",
       "linux/wayland/egl_dmabuf.h",
+      "linux/wayland/scoped_glib.cc",
       "linux/wayland/scoped_glib.h",
       "linux/wayland/screencast_portal.cc",
       "linux/wayland/screencast_portal.h",
diff --git a/modules/desktop_capture/linux/wayland/scoped_glib.cc b/modules/desktop_capture/linux/wayland/scoped_glib.cc
new file mode 100644
index 0000000..0d9a87d
--- /dev/null
+++ b/modules/desktop_capture/linux/wayland/scoped_glib.cc
@@ -0,0 +1,57 @@
+/*
+ *  Copyright 2022 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "modules/desktop_capture/linux/wayland/scoped_glib.h"
+
+namespace webrtc {
+
+template <>
+Scoped<GError>::~Scoped() {
+  if (ptr_) {
+    g_error_free(ptr_);
+  }
+}
+
+template <>
+Scoped<char>::~Scoped() {
+  if (ptr_) {
+    g_free(ptr_);
+  }
+}
+
+template <>
+Scoped<GVariant>::~Scoped() {
+  if (ptr_) {
+    g_variant_unref(ptr_);
+  }
+}
+
+template <>
+Scoped<GVariantIter>::~Scoped() {
+  if (ptr_) {
+    g_variant_iter_free(ptr_);
+  }
+}
+
+template <>
+Scoped<GDBusMessage>::~Scoped() {
+  if (ptr_) {
+    g_object_unref(ptr_);
+  }
+}
+
+template <>
+Scoped<GUnixFDList>::~Scoped() {
+  if (ptr_) {
+    g_object_unref(ptr_);
+  }
+}
+
+}  // namespace webrtc
diff --git a/modules/desktop_capture/linux/wayland/scoped_glib.h b/modules/desktop_capture/linux/wayland/scoped_glib.h
index 3af43ce..908bd6f 100644
--- a/modules/desktop_capture/linux/wayland/scoped_glib.h
+++ b/modules/desktop_capture/linux/wayland/scoped_glib.h
@@ -48,46 +48,17 @@
 };
 
 template <>
-Scoped<GError>::~Scoped() {
-  if (ptr_) {
-    g_error_free(ptr_);
-  }
-}
-
+Scoped<GError>::~Scoped();
 template <>
-Scoped<char>::~Scoped() {
-  if (ptr_) {
-    g_free(ptr_);
-  }
-}
-
+Scoped<char>::~Scoped();
 template <>
-Scoped<GVariant>::~Scoped() {
-  if (ptr_) {
-    g_variant_unref(ptr_);
-  }
-}
-
+Scoped<GVariant>::~Scoped();
 template <>
-Scoped<GVariantIter>::~Scoped() {
-  if (ptr_) {
-    g_variant_iter_free(ptr_);
-  }
-}
-
+Scoped<GVariantIter>::~Scoped();
 template <>
-Scoped<GDBusMessage>::~Scoped() {
-  if (ptr_) {
-    g_object_unref(ptr_);
-  }
-}
-
+Scoped<GDBusMessage>::~Scoped();
 template <>
-Scoped<GUnixFDList>::~Scoped() {
-  if (ptr_) {
-    g_object_unref(ptr_);
-  }
-}
+Scoped<GUnixFDList>::~Scoped();
 
 }  // namespace webrtc